showing this brown-colored bag. there's been a third picture that has emerged today, which they think was taken an hour and a half before the explosion. which seems to show a similar bag, but slightly behind the railing here. is this significant, jay? do we know what any of this means? >> well, potentially it is significant. it's very interesting. a third image appeared, cnn was able to obtain this photograph, which shows this bag that a lot of people have been wondering about and speculating about whether or not it contained an incendiary device or is related at all to this investigation. having been placed in a different location than it's appeared in other locations, this time behind the barricade instead of in front of the barricade in the general location of where one of the explosions went off. and i know, piers, you and your team, national security team, will be talking about this at greater length later on in the show. >> we will. jake, for now, thank you very much indeed. i want to bring in now deborah feye